Data processing apparatus and control method for shifting between standby, suspended, and power-off states
a data processing apparatus and control method technology, applied in the direction of digital output to print units, instruments, sustainable buildings, etc., can solve the problems of logical faults in auxiliary storage devices, time taken to shift from the power-off state to the standby state, and thus takes time. , to achieve the effect of quick shifting
Active Publication Date: 2016-01-05
CANON KK
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- Application Information
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Benefits of technology
The present invention provides a way to quickly shut down a data processing device when it is in a suspended state. This saves time and allows for quick activation of the device in the next power-on cycle.
Problems solved by technology
Hence, when the image forming apparatus in the suspended state shifts to the power-off state, it temporarily returns to the standby state and thus takes time, compared to directly shifting from the suspended state to the power-off state.
If the power cord is removed during shutdown processing, a logical fault may occur in the auxiliary storage device.
In this case, however, upon power-on at a later time, the image forming apparatus is activated while executing an inconsistency check, because flush processing for various caches that should be executed during shutdown processing has not been performed.
For this reason, the time taken to shift from the power-off state to the standby state becomes very long.
Method used
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[0022]Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be noted that the following embodiments are not intended to limit the scope of the appended claims, and that not all the combinations of features described in the embodiments are necessarily essential to the solving means of the present invention. Note that the embodiment will explain an image forming apparatus such as a multi-function peripheral as an example of a data processing apparatus according to the present invention. However, the present invention is not limited to this apparatus.
[0023]FIG. 1 is a block diagram showing the arrangement of an image forming apparatus 1 according to the embodiment.
[0024]A scanner 2 optically reads a document image and converts it into a digital image. A printer 4 prints (forms) an image based on the digital image on paper. An operation unit 5 is used when the user operates the image forming apparatus 1. A ha...
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When a data processing apparatus according to this invention detects generation of an event to shift from the standby state to the suspended state, it saves the contents of a memory in the standby state in a non-volatile storage device in response to detection of generation of the event, and shifts to the suspended state. When power-off is instructed in the suspended state, the data processing apparatus shifts from the suspended state to the power-off state without the mediacy of the standby state.
Description
BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates to a data processing apparatus which can take a standby state in which a job can be executed, and a suspended state serving as a power saving state, and a control method therefor.[0003]2. Description of the Related Art[0004]Recently, image forming apparatuses which have a power saving mode are becoming popular. An image forming apparatus of this type implements the power saving mode by reducing (or shutting down) the power supply to a main control unit, which controls the image forming apparatus when the image forming apparatus shifts to a non-standby state, from a normal state.[0005]Also, recent image forming apparatuses include an auxiliary storage device (for example, a hard disk) as standard equipment. The auxiliary storage device can hold user data, and save temporary data to be used when forming an image, or to be used in each processing to be executed by the image forming apparatus.[...
Claims
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IPC IPC(8): H04N1/00G06F1/32G06F3/12
CPCH04N1/00904G06F1/3206G06F1/3284G06F3/1221G06F3/1229H04N1/00891H04N1/00896Y02B60/1267Y02B60/1271Y02D10/00
Inventor HIGASHI, HIDENORI
Owner CANON KK